What do keeping greens fresh and hyperventilating have in common? They both involve breathing into a bag!

Put your fresh greens in a big plastic bag, gather up the neck, blow a little air, aka carbon dioxide, into the bag, then seal it up quick. If your greens are perfectly dry and really fresh (…), they’ll stay bright, firm and flavorful for at least a week like this.

The price of deliciously lush greens throughout the week is less space in the fridge. What tricks do you use to keep your greens fresh? Tell us in the comments. — CAREY GREENBERG-BERGER